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0, 4, 64, 1296, 32768, 1000000, 35831808, 1475789056, 68719476736, 3570467226624, 204800000000000, 12855002631049216, 876488338465357824, 64509974703297150976, 5097655355238390956032, 430467210000000000000000, 38685626227668133590597632
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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MAPLE
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a:=n->mul(2*sum(1, j=2..n+1), k=1..n+1): seq(a(n), n=0..17); # Zerinvary Lajos, Jan 01 2009
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MATHEMATICA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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